题目：
单词拼写：根据句意和所给首字母提示完成句中所缺单词。
1. The chemical factory p__________ terrible gas every day.
2. If you b__________ some fresh air, you will feel better.
3. Don't d__________ me now. I'm doing my homework.
4. As we know, n___________ of us likes pollution.
5. You shouldn't throw r___________ here and there.
6. We should do everything we can to protect the e___________.
7. Everyone is s__________ to do something useful.
8. Trees can p__________ the sand from moving towards the rich land.
9. You'd better take a taxi i__________ of walking there. Because it's a long way.
10. We really need to collect w__________ paper and soft drink cans.
答案：
1. produces 2. breathe 3. disturb 4. none 5. rubbish
6. environment 7. supposed 8. prevent 9. instead 10. waste
